automake: Add extra Makefile to handle unknown automake targets

automake: Add extra Makefile to handle unknown automake targets

Automake does not know how to compile Windows Resource files, so we have
manually told automake how to do this. One particular short-coming is
that dependencies are not automatically generated and tracked as they
are with other known automake targets. Address this by creating an extra
makefile that contains the automake rules needed for building source for
Windows targets. This also includes outputting more accurate tags during
compilation instead of using the generic "GEN" tag.

Signed-off-by: Chris Dickens <christopher.a.dickens@gmail.com>